Who is God from A Tale of Three Kings and what is their importance?

God is painted in this book as someone who likes to use broken people as his vessels or vehicles on earth. God uses David to lead his kingdom and to help his people move away from the selfish rule of Saul. God does not use Saul because Saul is not broken, he is simply misguided and ill-informed. David is broken by Saul and his spears as well as by the loneliness of his childhood and the behavior of the important people in his life, such as his father and brothers. David turns to God in his loneliness and opens himself open to him, hoping to please him with his behaviors. God then uses David to create a kingdom that serves him well here on earth.